/Engine/Source/Runtime/Engine/Public/BoneContainer.h
Map skeleton bone index to mesh index
the mesh pose bone index for the specified skeleton pose bone index. Returns an invalid index if the mesh does not include the specified skeleton bone.
[FMeshPoseBoneIndex](API\Runtime\AnimationCore\FMeshPoseBoneIndex) GetMeshPoseIndexFromSkeletonPoseIndex ( const [FSkeletonPoseBoneIndex](API\Runtime\AnimationCore\FSkeletonPoseBoneIndex) & SkeletonIndex ) const